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HP Recommended
Elite book 840 g-??
Microsoft Windows 10 (64-bit)

Title, I've done all methods I've found But yesterday  I did win + ? And it turned on (something checksum error thingy showed up) and it worked And today I made the FATAL mistake of shutting the laptop down and it won't turn on.. I have elitebook840 and idk what g it is 

 

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